OCR

A Tournadozer was also fitted with an A-frame, and it proved especially useful in moving the heavy pipe sections long distances across the fill. Even with a great deal of pipe moving, it was impossible for the dredge to put all of the material just where it was needed. The finishing operations were handled by the Allis-Chalmers HD-21 dozers assisted by a Michigan Model 380 rubber tire tractor dozer. The big 380 proved especially useful on the longer hauls. Its high speed in both directions, powerful pushing capacity and good flotation enabled it to equalize high and low spots over a wide area in the dredge deposit. The backbone of the entire operation was the 30" Franciscan, Because of the very abrasive nature of the sand, it was necessary to replace the pump shell, liner, and runner as often as twice a week. This resulted in a total of about 24 hours downtime a week while worn parts were replaced. There was very little other downtime as was shown by production: the dredge pumped an average of 950,000 cubic yards of material per month and kept to this figure for the entire job. Attending the dredge were two towboats, two anchor scows with 30 ton cranes, and a big boom scow used to change the pump parts. The towboats doubled as personnel carriers, to transfer the three shifts of workmen from shore to the dredge. The Port of Oakland awarded a separate contract to Gallagher & Burk, Inc., Oakland for the compaction and test rolling of the fill, 17 - St. Mary's Munitions Factory Work was done for the Commonwealth of Australia by Utah Australia Ltd. (sponsoring partner) in joint venture with Concrete Constructions Pty. Ltd. The project was located at St. Mary's, New South Wales. It commenced in August 1955 but was actually completed in December 1957, though shown here in 1958. Work included 24-1/2 miles of roads and footpaths, 11 miles of railroad, 4 bridges and 508 buildings with a total flow area of approximately 1,300,000 sq. ft. Approximately 200 miles including high pressure, reticulation, compressed air, hydraulic process piping was installed. Other installations included 3 refrigeration plants, compressor plants, air-conditioning plants, hydraulic systems, water purification plant, water cooling, complete sewage treatment plant.